Electronic automatic telephone switching system



Feb- 4, 1964 c. E. BROOKS ETAL 3,120,581

ELECTRONIC AUTOMATICEELEPHONE swITcEING SYSTEM C. E. BROOKS /NVEA/rons KW PFLEGER .B1/W., fw.

A T TORNE Y 3,120,581 ELECTRONIC AUTOMATIC TELEPHONE SWITCHING SYSTEM Filed Nov. 19, 195e C. E. BROOKS ETAL Feb. 4, 1964 51 Sheets-Sheet 2 @NIN NNIN

cf. BROOKS INVENTORS K W PIL-LEGER @yh/J4@ N ...YK

A 7' TORNE V ELECTRONIC AUTOMATIC TELEPHONE swITcHTNG SYSTEM Filed Nov. 19, 195e Feb. 4, 1964 c. E. BRooKs ErAL 51 Sheets-Sheet 5 cf. @Roo/f5 WENTO K. w PFLEGER A T TOR/ VE Y Feb. 4, 1964 c. E. BROOKS ETAL 3,120,581

ELECTRONIC AUTOMATIC TELEPHONE SWITCHING SYSTEM Filed'Nov. 19, 195e 51 Sheets-Sheet 4 6.5. @Roo/(5 NVE/W05; K. W. PFLEGE/ A 7' TORNE Y Feb. 4, 1964 c. E. BROOKS ETAL 3,120,531

ELECTRONIC AUTOMATIC TELEPHONE swITCHTNG SYSTEM 51 Sheets-Sheet 5 Filed Nov. 19, 1956 C. E. BROOKS NVE/"mg K. m PFLEGE/e www /J/'M47L4-h4.,

ATTORNEY c. E. BRooKs ErAL 3,120,581

ELECTRONIC AUTOMATIC TELEPHONE swTTCHTNC SYSTEM Feb. 4, 1964 Filed Nov. 19, 1956 51 Sheets-Sheet 6 C. E. BROOKS K. W PFLEGE/P IN VEN TORS huk k ...El

A T TOR/VE Y c. E. BROOKS ETAL 3,120,581

51 Sheets-Sheet 'Z ELECTRONIC AUTOMATIC TELEPHONE SWITCHING SYSTEM Feb. 4, 1964 Filed Nov. 19. 1956 A T TORNEV Feb. 4, 1964 c. E. BROOKS ErAL 3,120,581

ELECTRONIC AUTOMATIC TELEPHONE swITCETNC SYSTEM Filed Nov. 19, 1956 51 Sheets-Sheet 8 CE. BROOKS A. W PFLEGER A T TORNE Y /N VEN TORS ELECTRONIC AUTOMATIC TELEPHONE SWl'TCI-IING SYSTEM Filed NOV. 19, 1956 Feb. 4, 1964 c. E. BROOKS E'rAL 6.5. BROOKS K. W PFLEGER 51 Sheets-Sheet 9 INVENTORS WJLM i' A r rom/EV Feb. A4, 1964 c. E. BRooKs ETAL 3,120,531

ELECTRONIC AUTOMATIC TELEPHONE swTTcETNG SYSTEM Filed Nov. 19, 1956 51 Sheets-Sheet l0 SECOND DETECTOR c. E. @Roo/(s NVENTS K. W PFLEGE/P A T TOPNE V ELECTRONIC AUTOMATIC TELEPHONE SWITCHING SYSTEM Filed Nov. 19, 195e Feb. 4, 1964 c. E. BRooKs ETAL 51 Sheets-Sheet 11 cf. BROOKS NVENTO K. m PFLEGE-R ATTORNEY ELECTRONIC AUTOMATIC TELEPHONE SWITCHING SYSTEM Filed Nov. 19, 1956 C. E. BROOKS ETAL Feb. 4, 1964 51 Sheets-Sheet 12 A T TORNE Y Feb. 4, 1964 Filed NOV. 19, 1956 Tu- 1 'il 1 I MASTER c. E. BROOKS ErAL 3,120,581

ELECTRONIC AUTOMATIC TELEPHONE SWITCHING SYSTEM 51 Sheets-Sheet 13 C. E. BROOKS /NVENTORS K W PFLEGER Feb 4, 1964 c. E. BROOKS ETAL 3,120,581

ELECTRONIC AUTOMATIC TELEPHONE SWITCHING SYSTEM Filed Nov. 19, l1956 51 sheets-Sheet. 14

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ATTORNEY ELECTRONIC AUTOMATIC TELEPHONE SWITCHING SYSTEM Filed Nov. 19, 1956 Feb. 4, 1964 c. E. BRooKs ErAL 51 Sheets-Sheet 15 om M K6 o n. P f. I l l EW. 6 K. M ww m rwml M .NOQkQU :NWN QOQMM. |S| MVS Jul. .QQ MIQAJNI umu n.

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ATTORNEY 51 Sheets-Sheet 16 C. E. BROOKS ETAL Feb. 4, 1964 ELECTRONIC AUTOMATIC TELEPHONE SWITCI-IING SYSTEM Filed Nov. 19, 1956 ATTORNEY Feb. 4, 1964 c. E. BROOKS ETAL 3,120,581

ELECTRONIC AUTOMATIC TELEPHONE SWITCHINC SYSTEM /N VEN TORS DEIN Filed NOV. 19, 1956 A TTORNE V Feb. 4, 1964 c. E. BRooKs ETAL 3,120,581

ELECTRONIC AUTOMATIC TELEPHONE swTTcETNG SYSTEM 5l Sheets-Sheet 18 Filed Nov. 19, 1956 ATTORNEY c. E. BROOKS NVENTO Kw PFLEGE/Q ELECTRONIC AUTOMATIC TELEPHONE SWITCHING SYSTEM Filed NOV. 19, 1956 Feb. '4, 1964 c. E. BROOKS ET AL www uw ATTORNEY Feb. 4, 1964 c. E. BROOKS ETAL 3,120,581

ELECTRONIC AUTOMATIC TELEPHONE SWITCI-IING SYSTEM Filed NOV 19, 1956 5l Sheets-Sheet 20 c. BROOKS NVENTO- A T TORNE Y 

1. IN A TELEPHONE SWITCHING SYSTEM, IN COMBINATION, A PLURALITY OF SUBSCRIBERS'' LINES, A SOURCE OF ELECTRICAL ENERGY FOR ENERGIZING SAID SUBSCRIBERS'' LINES, A PHOTOTRANSISTOR INDIVIDUAL TO EACH OF SAID SUBSCRIBERS'' LINES INTERCONNECTED WITH THE RESPECTIVE SUBSCRIBERS'' LINES AND SAID SOURCE OF ELECTRICAL ENERGY, A PAIR OF CATHODE RAY BEAM ELECTRON DISCHARGE TUBES EACH HAVING A PHOSPHOR AT ONE END THEREOF, MEANS FOR SUPPORTING SAID PHOTOTRANSISTORS BETWEEN SAID ENDS OF SAID TUBES, AND MEANS FOR SIMULTANEOUSLY DIRECTING THE BEAMS WITHIN SAID TUBES TO ENERGIZE A SMALL SECTION OF THE RESPECTIVE PHOSPHORS ADJACENT THE SAME PHOTOTRANSISTOR. 